package servlet;


import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
/**
 * 1.网址能够访问当前Java类
 * 2.能够接受网址传递过来的参数
 * 3.能将查询出来的数据传递给前端页面
 * 4.控制显示前端页面
 */
@WebServlet("/notice.jsp")
public class NoticeServlet {
    public class NoticeServlet extends HttpServlet {
        @Override
        protected void doGet(HttpServletRequest req, HttpServletResponse resp)
                throws ServletException, IOException {
            //3
            String p = req.getParameter("page");
            int page = 1;
            if (p !=null && p.equals("")){//页面字符串不为空 强制转化为数字
                page = Integer.parseInt(p);
            }
            NoticeDao noticeDao = new NoticeDao();
            int totalPage = noticeDao.countPage();
            List<NoticeBean> notice = noticeDao.getList(page);
            req.setAttribute("notice", notice);
            req.setAttribute("currentPage", page);//当前页数
            req.setAttribute("totalPage", totalPage);//总页数
            //4 显示页面
            req.getRequestDispatcher("WEB-INF/notice.jsp").forward(req, resp);
        }
    }
}
